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1answer
19 views

Is a blood pressure of 136/90 unhealthy if stays consistent for several years?

Some doctors I've seen say it warrants blood pressure medicine where as others say its not high enough for meds and although not optimal, its okay. My curiosity is about understanding the boundary of ...
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1answer
52 views

I can control my heart rate “like a muscle”. Is it safe? What could the mechanism be?

First off, sorry if this is inappropriate for this board. I couldn't find a "Health" sub-SE. A few years ago, I was messing around with the concept of "psi" (an energy that supposedly exists in ...
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0answers
624 views

Firstbeat Energy Expenditure Algorithm

I am looking for an implementation (or a document that describes the actual algorithm) for the energy expenditure/VO2/EPOC calculation from the heart rate variability. A few white papers about ...
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High intensity performance training

Some footballers/Soccer players die of cardiac arrest. Was it because of the High intensity performance on the field or increased heart rate. Some footballers run at a speed of 34.7KM/H . Even after ...